Tackifier for elastomer compounds

A polymeric tackifier having a number average molar mass (Mn) of from 200 to 1,500 g/mol comprising a phenol compound, a linker group L and end group E, wherein said polymeric tackifier comprises 50 wt. % to 70 wt. % phenol compound, 20 wt. % to 50 wt. % of the linker group L, and 5 wt. % to 40 wt. % of the end group E based on the mass of the polymeric tackifier, said low molar mass polymer tackifier having the structure as presented in formula 1 below:

• wherein the linker group L has the meaning of
• each end group E has the meaning of H or is a group of Formula 2 with only one bond to a phenol compound in formula 1 or has the meaning of
• and wherein R1 is H, C1-15 alkyl, or C1-15 oxyalkyl,
• R2 and R4 are independently from each other H or C1-5 alkyl,
• R3 is OH, NO2, or halogen, C1-5 alkyl or C1-5 oxyalkyl,
• R15 and R17 are independently from each other H or C1-5 alkyl, m is an integer from 1 to 7, and
• n is an integer of from 2 to 21.